Haha, so simple. Why didnĀ“t I change it out earlier. Anyways, solving the power issue, "fuel filter", didnĀ“t know that woud make such a difference. Solving the no heat issue, radiator flush and changed the thermostat. I checked the hoses from the firewall and they were hot, so i no flushing needed there. So, thanks for the help fellas! Now to change out the drivers side power window motor...Thanks again!

 

I just bought a 2001 blazer and I am basically having the same issues as the original post. I usually can get moving if I have the pedal in a specific place, but nothing lower or higher. Also it seems from a stop that there is a clicking under the gas pedal. The other day I had a diagnostic and it had 0300 for random misfire and 0150 for O2 sensor. Today it was running fine and then I drove an hour or so later and it died in the middle of the intersection after stepping on the gas with no acceleration. Any help would be greatly appreciated.